have a nodding acquaintance with somebody/something

have a nodding acquaintance (with someone or something)

To have a slight or precursory knowledge of someone or something. Jim asked me to help fix his computer for him, but I'm afraid I only have a nodding acquaintance with how his machine works. Ruth and I had only a nodding acquaintance before going to the party, but once we got talking, it was like we'd been friends our whole lives.
See also: acquaintance, have, nod, someone
Farlex Dictionary of Idioms.

have a nodding acˈquaintance with somebody/something

know somebody slightly/know a little about something: I have a nodding acquaintance with some members of the committee. You need at least a nodding acquaintance with the rules of chess to understand the book.
See also: acquaintance, have, nod, somebody, something
Farlex Partner Idioms Dictionary
See also:
  • have a nodding acquaintance (with someone or something)
  • have a nodding acquaintance with someone or something
  • a little knowledge is a dangerous thing
  • little knowledge is a dangerous thing
  • little knowledge is a dangerous thing, a
  • dangerous
  • little learning is a dangerous thing, a
  • a little learning is a dangerous thing
  • learning
  • be on nodding terms